4-V to 14-V, 40-A synchronous SWIFT™ buck converter with adaptive internal compensation


Product details


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LQFN-CLIP (RVF) 40 35 mm² 7 x 5 open-in-new Find other Buck converters (integrated switch)


  • Internally-Compensated Advanced Current Mode Control 40-A POL
  • Input Voltage Range: 4 V to 14 V
  • Output Voltage Range: 0.6 V to 5.5 V
  • Integrated 3/0.9-mΩ Stacked NexFET™ Power Stage With Lossless Low-Side Current Sensing
  • Fixed Frequency - Synchronization to an External Clock and/or Sync Out
  • Pin Strapping Programmable Switching Frequency
    • 300 kHz to 2 MHz for Standalone
    • 300 kHz to 1 MHz for Stackable
  • Stack 2× for up to 80 A With Current Share, Voltage Share, and CLK Sync
  • Pin Strapping Programmable Reference from 0.6 V to 1.1 V With 0.5% Accuracy
  • Differential Remote Sensing
  • Safe Start-Up into Prebiased Output
  • High-Accuracy Hiccup Current Limit
  • Asynchronous Pulse Injection (API) and Body Braking
  • 40-pin, 5-mm × 7-mm LQFN Package with 0.5-mm Pitch and Single Thermal Pad
  • Create a Custom Design Using the TPS543C20 With the WEBENCH® Power Designer

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The TPS543C20 employs an internally compensated emulated peak-current-mode control, with a clock synchronizable, fixed-frequency modulator for EMI-sensitive POL. The internal integrator and directly amplifying ramp tracking loop eliminate the need for external compensation over a wide range of frequencies thereby making the system design flexible, dense, and simple. Optional API and body braking help improve transient performance by significantly reducing undershoot and overshoot, respectively. Integrated NexFET™ MOSFETs with low-loss switching facilitate high efficiency and deliver up to 40 A in a 5-mm × 7-mm PowerStack™ package with a layout friendly thermal pad. Two TPS543C20 devices can be stacked together to provide up to 80-A point-of-load.

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Exact equivalent in functionality and parametrics to the compared device:
TPS543C20A ACTIVE 4-V to 16-V, 40-A synchronous SWIFT™ buck converter with adaptive internal compensation Higher operating input voltage (16 V) and abs max voltage (18 V)
Same functionality but is not pin-for-pin or parametrically equivalent to the compared device:
TPS543B20 ACTIVE 4-V to 19-V, 25-A synchronous SWIFT™ buck converter with adaptive internal compensation A pin-compatible product with lower current.

Technical documentation

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Type Title Date
* Datasheet TPS543C20 4-VIN to 14-VIN, 40-A Stackable, Synchronous Step-Down SWIFT™ Converter With Adaptive Internal Compensation datasheet (Rev. B) May 09, 2018
Selection guide Buck Converter Quick Reference Guide (Rev. B) Apr. 08, 2021
Technical article Minimize the impact of the MLCC shortage on your power application Mar. 29, 2019
Application note DC/DC Point-of-load Power Solutions for Wired Networking Switch Systems Dec. 11, 2018
White paper Internally compensated advanced current mode (ACM) (Rev. A) Dec. 07, 2018
Application note Comparing internally-compensated advanced current mode (ACM) w/ D-CAP3™ control (Rev. A) Nov. 06, 2018
Application note Solve Point-of-Load Power Design Challenges: Single Board Computer Applications Aug. 24, 2018
User guide TPS543C20EVM-054 User Guide Jul. 11, 2018
Technical article Maintain a constant phase margin in a synchronous buck converter Mar. 02, 2018
Technical article Powering FPGAs – Improving overshoot of voltage regulators for Intel Arria 10 and Stratix 10 FPGAs Feb. 08, 2018
Technical article Powering FPGAs – Improving undershoot of voltage regulators with asynchronous pulse injection Feb. 02, 2018
Application note Understanding thermal-resistance specification of DC/DC convert. w/ MOSFETs Jan. 04, 2018
Selection guide Control-Mode Quick Reference Guide (Rev. A) Sep. 14, 2017
User guide TPS543C20 40-A Single Synchronous Step-Down Converter Feb. 08, 2017

Design & development

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Hardware development

document-generic User guide

The TPS543C20EVM-054 evaluation module provides a fixed 0.9-V output at up to 40 A from a nominal 12-V input bus. The design acheives 90% peak efficiency.

  • 500-kHz operation
  • 10-mVpp ripple at 40 A
  • Module supports 5-V to 16-V input
document-generic User guide

The TPS543C20EVM-869 is a two-phase buck converter with two TPS543C20 devices interleaved. It uses a nominal 12-V bus to produce a regulated 0.9-V output at up to 80-A load current (40-A per phase). The TPS543C20EVM-869 is designed to demonstrate the stacking operation of the TPS543C20. The (...)

  • 500-kHz operation
  • 10-mVpp ripple at 40 A
  • Module supports 5-V to 16-V input

Design tools & simulation

SLUM589A.ZIP (127 KB) - PSpice Model
PSpice® for TI design and simulation tool
PSPICE-FOR-TI — PSpice® for TI is a design and simulation environment that helps evaluate functionality of analog circuits. This full-featured, design and simulation suite uses an analog analysis engine from Cadence®. Available at no cost, PSpice for TI includes one of the largest model libraries in the (...)
  • Leverages Cadence PSpice Technology
  • Preinstalled library with a suite of digital models to enable worst-case timing analysis
  • Dynamic updates ensure you have access to most current device models
  • Optimized for simulation speed without loss of accuracy
  • Supports simultaneous analysis of multiple products
  • (...)

Reference designs

180-W, Dual-Channel, Step-Down Converter Reference Design with 97% Efficiency for Server PSU
TIDA-01444 — The TIDA-01444 reference design for server PSU, PC PSU, and other step-down converter applications implements a 180-W buck, dual-channel DC-DC converter with a regulatory 12-V DC input voltage designed to provide the terminal load voltage with greater than 97% efficiency and good thermal (...)
document-generic Schematic document-generic User guide
Dual-phase compact reference design for 2.7 V 60 A for telecommunications
PMP21619 — This reference design uses only 2 ICs in a stacked configuration to provide 2.7 V at 60 A in a compact form factor. Both an all ceramics output capacitors version and a low ESR polymer output capacitors version were demonstrated to meet requirement of less than 3% undershoot for a step load from 2 A (...)
document-generic Schematic document-generic User guide
Dual Phase Stackable Buck Converter Reference Design with Full Test Capability
PMP21386 — This reference design uses TPS543C20 in a stacked configuration to provide 0.85V @ 40A in a compact (21mm x 35mm) form factor with low temperature rise with no airflow. Board includes on board high speed dynamic load tester, output ripple probe interface, and test point for stability analyzer, such (...)
document-generic Schematic document-generic User guide
1V, 20A Highly Integrated Synchronous Buck Converter Reference Design
PMP20050 — The TPS543C20 is a highly integrated, synchronous buck converter tailored for high density power solutions wich features high performance integrated MOSFETs with very low RDSon to achieve high efficiency. This converter enables the design of a 1V, 20A power supply capable of acheiving efficiency (...)
document-generic Schematic document-generic User guide

CAD/CAE symbols

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LQFN-CLIP (RVF) 40 View options

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